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            success:res=>{
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            // var res = "hello world"
            success("hello world")
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            success:res=>{
                console.log(res)
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        })
        var arr = [1,2,3,4,6,8]
        // arr.splice(2,2,'html','css')
        // console.log(arr)
        var res = arr.filter(item=>{
            return item>2
        })
        console.log(res)
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